Avaliação da potencialidade do resíduo secundário de caulim do Pará para utilização em porcelanato

Abstract

The kaolin waste evaluated is characterized as secondary due be coming from the steps of centrifugation, magnetic separation, bleaching and filtering, which gives a ratio which provides a significant residue, about 26% of their gross and sedimentation ponds, that is intended for embankments. This study aimed to evaluate the potential of reusing the kaolin waste processing from Imerys RCC in the region of Barcarena (PA) in formulation of ceramic bodies for porcelain tiles production, seeking to property of maximum water absorption of 0.5 % for this type of product. The residue from the production of kaolin had been previously characterized by chemical analysis and X-ray diffraction and there is a significant amount of kaolinite concentration, differential thermal analysis, thermogravimetric and SEM, other techniques were performed at work. After the ceramic processing to obtain the test specimens with different amounts of residue replacing the kaolin, these were sintered using 1200, 1220 and 1240 °C for 2 hours. The formulations were evaluated by water absorption, linear firing shrinkage and Modulus of Rupture at a three-point bending setup of the pieces produced.